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46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "misc.h"
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#include "drivers/dbgserial.h"
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#include <stdint.h>
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void itoa(uint32_t num, char *buffer, int buffer_length) {
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if (buffer_length < 11) {
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dbgserial_putstr("itoa buffer too small");
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return;
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}
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*buffer++ = '0';
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*buffer++ = 'x';
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for (int i = 7; i >= 0; --i) {
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uint32_t digit = (num & (0xf << (i * 4))) >> (i * 4);
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char c;
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if (digit < 0xa) {
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c = '0' + digit;
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} else if (digit < 0x10) {
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c = 'a' + (digit - 0xa);
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} else {
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c = ' ';
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}
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*buffer++ = c;
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}
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*buffer = '\0';
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}
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